Metal and Ligand Effect on the Structural Diversity of Divalent Coordination Polymers with Mixed Ligands: Evaluation for Photodegradation

Abstract

Eight coordination polymers constructed from divalent metal salts, N,N′-bis(pyridin-3-ylmethyl)terephthalamide (L), and various dicarboxylic acids are reported, affording [Co(L)(5-ter-IPA)(H2O)2]n (5-tert-H2IPA = 5-tert-butylisophthalic acid), 1, {[Co(L)(5-NO2-IPA)]⋅2H2O}n (5-NO2-H2IPA = 5-nitroisophthalic acid), 2, {[Co(L)0.5(5-NH2-IPA)]⋅MeOH}n (5-NH2-H2IPA = 5-aminoisophthalic acid), 3, {[Co(L)(MBA)]⋅2H2O}n (H2MBA = diphenylmethane-4,4′–dicarboxylic acid), 4, {[Co(L)(SDA)]⋅H2O}n (H2SDA = 4,4-sulfonyldibenzoic acid), 5, {[Co2(L)2(1,4-NDC)2(H2O)2]⋅5H2O}n (1,4-H2NDC = naphthalene-1,4-dicarboxylic acid), 6, {[Cd(L)(1,4-NDC)(H2O)]⋅2H2O}n, 7, and {[Zn2(L)2(1,4-NDC)2]⋅2H2O}n, 8, which were structurally characterized by using single-crystal X-ray diffraction. The structural types of 1–8 are subject to the metal and ligand identities, showing a 2D layer with the hcb, a 3D framework with the pcu, a 2D layer with the sql, a polycatenation of 2-fold interpenetrated 2D layer with the sql, a 2-fold interpenetrated 2D layer with the 2,6L1, a 3D framework with the cds, a 2D layer with the 2,4L1, and a 2D layer with the (102⋅12)(10)2(4⋅10⋅124)(4) topologies, respectively. The investigation on the photodegradation of methylene blue (MB) by using complexes 1–3 reveals that the degradation efficiency may increase with increasing surface areas.

Cd(ii) coordination polymers constructed from tris-pyridyl-tris-amide and polycarboxylic acid: synthesis, structures and sensing properties

“…11 The chemistry of bis-pyridyl-bis-amide (bpba) based CPs has been investigated extensively and interesting structural types thus prepared have been identified. 12,13 The bpba ligands bear pairs of pyridyl nitrogen atoms and amide oxygen atoms that may coordinate with the transition metal atoms to form CPs with different dimensionality, whereas the two amide groups play important roles as abundant potential hydrogen bond sites. 14 Extension of the bpba to tripodal ligands with the C 3 symmetry containing three amide groups and three pyridyl rings (tris-pyridyl-tris-amide, tpta) may result in CPs with different structural diversity.…”

Structural diversity of cadmium coordination polymers based on an extended anilate-type ligand

“…Combining these properties of the cadmium ion allows us to expect a variety of possible structures when forming coordinating polymers. As shown in recent works, [71][72][73][74][75][76] another important point that will contribute to obtaining different topologies in the final product is the rigidity/flexibility of the N-donor linkers. Together with the possibility of Z/E isomerization in the diiminophenylene moiety of the extended anilate ligand H 2 L, this will allow to adapt the conformations of the organic bridges to the construction of a coordination sphere suitable for a particular metal cation.…”